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Conciliation of top-down and bottom-up inventories to estimate mobile source emissions in Bogota, Colombia
Authors: Luis Gabriel Carmona Aparicio, Mauricio Alexander Rincón Pérez, Andrés Mauricio Castillo Robles, Boris René Galvis Remolina, Hugo Enrique Sáenz Pulido, Rodrigo Alberto Manrique Forero, Jorge Eduardo Pachón Quinche
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ABSTRACT
Aim: This study presents the reconciliation of inventories
of mobile emission in Bogota in 2013, applying
top-down and bottom-up methodologies.
Method: A comparison of emissions from different
vehicle categories was conducted, as well as the
geographical and temporal distribution of them, by
creating a processing code in JAVA. The process employed
the largest amount of information available
from the authorities of the Capital District, and previous
studies. The innovation of this research is the
estimation of the traffic flows in secondary roads, based
on an algorithm that considers road geometry,
interaction between arterial and secondary roads,
and legal restrictions on traffic.
Results: The results show the estimated emissions for
pollutants CO, CO2
, VOCs, NOx
, SO2
and PM, and
its comparison with other studies for the city. The
values obtained can be classified as minimum and
maximum references of the emissions generated in
2013, due to data uncertainty.
Conclusions: The project provides an upmost useful
tool as input for the authorities in order to identify
areas with significant emissions and to develop strategies
for emissions reduction, towards improving
the air quality of citizens. This method can be replicated
in the generation of protocols for estimating
emissions from mobile sources, but results need to
be carefully reviewed given the quality of information
sources.